Optical Rotary Reset Assembly for Precise Display Screen Positioning
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Solution Overview
Problem
Existing automobile central control panels face challenges in precise stopping and holding due to free play or slop in the rotating transmission gear, making it difficult to stop the central control display screen in horizontal or vertical positions with precision.
Innovation Solution
A rotary device with an automatic reset function, comprising a conversion assembly, power assembly, and sensing assembly, which includes a light-shielding structure and optical sensing elements to generate real-time position signals, allowing precise control of the rotation angle and eliminating errors by triggering signals to stop or continue rotation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a mechanical rotating structure with transmission gear is used, then the device can rotate, but free play or slop of about 3° occurs due to gaps and tolerances
Solution Approach 1:
The patent replaces the mechanical transmission gear system with an optical sensing system. A light-shielding structure with light-shielding teeth is used instead of mechanical gears, and optical sensors detect the position by sensing light blocking patterns. This substitution eliminates mechanical gaps and tolerances that cause free play, achieving precise angular positioning without the 3° slop inherent in mechanical systems.
Solution Approach 2:
The patent introduces an optical intermediary (light) as a mediator between the rotating element and the sensing system. The light-shielding structure modulates light to encode rotational position information, which is then detected by optical sensors. This intermediary approach allows precise position detection without direct mechanical contact, eliminating the free play problem caused by mechanical tolerances.
2Manufacturing precision
If optical sensing elements are added to achieve precise positioning, then stopping precision is improved, but device complexity increases
Solution Approach 1:
The light-shielding structure serves multiple functions: it acts as both the rotating element and the position encoding marker. The same structure that rotates to change display angles also provides the light-shielding pattern that encodes angular position information. This multi-functionality reduces the need for separate sensing markers and simplifies the overall structure despite the precision capabilities.
Solution Approach 2:
The patent uses a simplified optical copying approach where the light-shielding teeth create a pattern that directly represents angular position. Instead of complex encoders or multiple sensing elements, the system uses a straightforward light-blocking pattern that can be detected by simple optical sensors, reducing complexity while maintaining precision.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The rotary device achieves precise stopping and holding of the display screen without free play or slop, enhancing positional accuracy and eliminating rotation errors, enabling precise control at specific angles such as horizontal or vertical positions.
Implementation Method 1
a light-shielding structure with the light-shielding structure on the extension part. The power assembly with output element can drive the extension part to rotate synchronously with the light-shielding structure
Data Source
AI summary
A rotary device with automatic reset function for precise stopping and holding of a viewable rotating element without free play or slop remaining includes a conversion assembly, and a power assembly with output element and sensing assembly. The conversion assembly comprises a light-shielding structure with the light-shielding structure on the extension part. The power assembly with output element can drive the extension part to rotate synchronously with the light-shielding structure. The detachable sensing assembly overlaps the rotation path of the light-shielding structure, and the conversion assembly rotates at different angles so that the light-shielding structure and the sensing assembly will match at certain angles, so as to trigger a sensing signal and call up the output element. A display screen includes the rotary device with automatic reset function and a display assembly.